Jobs???????????

So Im applying for a job at this supermarket which is always looking for people and everybody gets jobs there. Two of my friends in the last 2 weeks got jobs. And theyre getting pretty desperate because theyre looking for temporary workers if theres a strike. I applied online and last time they called me (i got talked out of going to the interview.) without me calling them. I dont know if i should call them this time. My friend always said i should call but i worry about coming across as pushy. And should I Iapply at the temp workers job fair too? IOr should I just stay wiith my online app? And should I call?